A good management of the energy on board is the key point to sail in total serenity, regardless the consumption of the on-board electronics or other electrical appliances. Watt&Sea’s hydrogenerators propose an energy self-sufficiency solution on board of cruise or race boats, in the respect of the environment. Stemmed from ocean racing research, the first Watt&Sea hydrogenerator gets started in 2008 with the objective of an optimal output associated to a negligible drag, letting the boat sail with a positive energy while loading the batteries. Our hydrogenerator has since then being improved taking into account users’ comments, so that we are proposing today an even more reliable and efficient product. Validated on all seas around the globe, they are the most powerful, reliable and lightest available on the market.
Watt&Sea’s hydrogenerators are usually fastened on the transom of the boats thanks to the fastening kit supplied (adapted to straight and vertical transom). The lifting up and down are similar to a rudder blade’s handling. The charge power being so important, it allows to lift the hydrogenerator up when batteries are fully loaded. Handling makes it easier thanks to high quality steering : an Antal low friction ring to divide the effort plus a Harken cam cleat to maintain the unit in its position.
Watt&Sea racing hydrogenerators have radically modify the energy management on board and have become essential pieces of equipment in mythical offshore races like the Vendée Globe or the Route du Rhum. The VOLVO OCEAN RACE has chosen to place its confidence in Watt&Sea, by equipping the Volvo Ocean 65 fleet present on the start line on the 22nd October 2017 ! Racing hydrogenerators are equipped with a controlled pitch propeller, functionning electronically with an independent system. The drag is minimal and the energy output is optimal on a speed range from 5 to 30 knots.
Racing hydrogenerators are equipped with a controlled pitch propeller, such as an “aeroplane propeller”. High speed launch is possible, putting the blades in the feathered position.
Tailored for high winds… Rather than having to stop the turbine in too strong winds (>35 knots), the WATT AND SEA turbine has a “storm” mode that can be activated on the converter. This allows the propeller to produce energy, around 120W, by maintaining it in a slow and safe regime, up to 50 knots of apparent wind.
This new-design wind-generator is under testing since one year in collaboration with MACIF Design Team with the goal to achieve full autonomy on their giant trimaran Constructed with a lightweight and waterproof casing inspired from our hydrogenerators, this wind turbine makes the difference thanks to its original and efficient design. Contrary to common wind turbines, the propeller is located behind the holding tower and therefore allows unrivalled stability in waves and turbulences.
The uncommon rotor location gives a natural stabilty because the thrust application point is behind, or down-wind, the axis of yaw. That’s why there is no need for a stabilizer or tail. Stability is of first importance on marine wind-turbines that are subject to turbulences from rigging and disturbing motions from waves. Stable device means high performance and good agreement between laboratory and real-life production !
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